JP3682611B2 - Corrugated cage for ball bearings - Google Patents

Corrugated cage for ball bearings Download PDF

Info

Publication number
JP3682611B2
JP3682611B2 JP16056296A JP16056296A JP3682611B2 JP 3682611 B2 JP3682611 B2 JP 3682611B2 JP 16056296 A JP16056296 A JP 16056296A JP 16056296 A JP16056296 A JP 16056296A JP 3682611 B2 JP3682611 B2 JP 3682611B2
Authority
JP
Japan
Prior art keywords
ball
spherical concave
spherical
concave portion
center
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP16056296A
Other languages
Japanese (ja)
Other versions
JPH09317775A (en
Inventor
弘 上野
英樹 藤原
治生 木村
一寿 梶原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koyo Seiko Co Ltd
Original Assignee
Koyo Seiko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koyo Seiko Co Ltd filed Critical Koyo Seiko Co Ltd
Priority to JP16056296A priority Critical patent/JP3682611B2/en
Priority to DE69730777T priority patent/DE69730777T2/en
Priority to EP97108855A priority patent/EP0810381B1/en
Priority to US08/866,156 priority patent/US5806990A/en
Publication of JPH09317775A publication Critical patent/JPH09317775A/en
Application granted granted Critical
Publication of JP3682611B2 publication Critical patent/JP3682611B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/42—Ball cages made from wire or sheet metal strips
    • F16C33/422—Ball cages made from wire or sheet metal strips made from sheet metal
    • F16C33/427—Ball cages made from wire or sheet metal strips made from sheet metal from two parts, e.g. ribbon cages with two corrugated annular parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3887—Details of individual pockets, e.g. shape or ball retaining means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/664—Retaining the liquid in or near the bearing
    • F16C33/6651—Retaining the liquid in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/22—Internal combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/02—Crankshaft bearings

Description

【０００１】
【発明の属する技術分野】
この発明は、玉軸受用の波形保持器、特に２サイクルエンジンのクランクシャフト等のように潤滑条件の厳しい環境で使用される玉軸受の波形保持器であって焼付の生じにくい構造とした玉軸受用波形保持器に関する。
【０００２】
【従来の技術】
玉軸受用の波形保持器は、円周方向等配に軸方向に膨出する玉保持部を形成した環状保持板二枚を対向接合して玉を配置するポケットを形成してある。通常、波形保持器のポケット内面は使用する玉の曲率半径の数％程度大きい曲率半径となるように形成されて玉を保持している。
即ち、図４の斜視図に示すように、従来の波形保持器２１は、円周方向等間隔に玉保持部２３，２３，・・・を形成した二枚の環状保持板２２，２２を、これら玉保持部２３と玉保持部２３とがポケット２６を形成するよう対向させ、平坦部（接合部）２４，２４を接合してリベット７で固定して製作する。ポケット２６に玉を配置したこの波形保持器２１は、内輪と外輪（いずれも図示省略）との間に形成される環状空間に配置される。
【０００３】
従来の玉軸受用の波形保持器としては、振動や騒音を防止するためポケットを形成する玉保持部を、保持器の半径方向に短径を有する回転楕円に形成した玉軸受用保持器（実公昭４０−１４７６４号）や、玉の円滑な回転を確保するため玉保持部を形成する二枚の環状保持板同士が相対的に若干平行遊動できるように組まれた玉軸受用保持器（実公昭５３−４２６８１号）、或いは図７に示すように、軸方向に膨出させた玉保持部３３，３３の一部に円筒状範囲３４，３４，３４，３４を形成したポケット３６を有する玉軸受用の波形保持器３１（特開平３−１７２６１３号）等が提案されている。
【０００４】
図５（Ａ）は、上記した従来の玉軸受用の波形保持器２１を、軸受のピッチ円方向に沿って切断した状態の断面図である。この場合、玉軸受は、その軌道輪（内輪若しくは外輪）が相対回転するとき玉５及び保持器２１も同時に回転（公転）するが、玉５は、回転方向（進行方向）の前面側と波形保持器２１のポケット２６の内壁面で接触しながら回転（公転及び自転）することになる。即ち、波形保持器２１が公転運動するとき、玉５は、軸線Ｚ回りに自転しながら波形保持器２１のポケット２６の進行方向の内壁面２６ａ，２６ｂで接触している。この接触部分は、図５（Ａ）のＡ−Ａ矢視方向から見た場合、図５（Ｂ）に示すような形状となっている。
【０００５】
【発明が解決しようとする課題】
上記するように、玉５とポケット２６の内壁面とが接触し、図６に示すように、玉５が軸線Ｚ回りに自転すれば、自転時の角速度をω（一定）とし且つ玉５の任意の表面から軸線Ｚまでの半径（垂直距離）をｒとすると、その玉表面の周速度ｖは、ｖ＝ω・ｒ、であるから、該玉５は、回転半径が最も大きくなる位置の近傍で波形保持器２１のポケット内面と接触していることになる。即ち、玉５は最大自転周速を有する位置Ｐ，Ｐのいずれかの近傍でポケットの内壁面と接触していることになり、焼付の問題が発生しやすい状態になっている。
尚、上記する図７に示すような波形保持器３１では玉を半径方向にはガイドできない。即ち、内・外輪間に配置された玉を保持するこのような保持器は半径方向には自由に移動することになり、回転時、保持器の所謂みそ擦り運動が激しくなり異常振動や異常摩耗（焼付）が生じやすくなり、また高速時回転が安定しない傾向にあるという問題がある。
【０００６】
この発明は上記する課題に着目してなされたものであり、玉と保持器との焼付が生じにくく潤滑剤の保持も長く保持でき、軸受寿命を長寿命とすることのできる玉軸受用波形保持器を提供することを目的とする。
【０００７】
【課題を解決するための手段】
即ち、この発明はじょうきする課題を解決するために、請求項１に記載の発明は、軸方向に膨出する玉保持部と平坦部とを円周方向に所定間隔に形成した二枚の環状保持板が、各玉保持部を対向させるように組み合わされて玉を保持するポケットを形成してなる玉軸受用波形保持器において、前記両環状保持板に形成したそれぞれの玉保持部を玉より大きな曲率半径を有する第１の球面状凹部にて形成するとともに、該第１の球面状凹部の底部に、第１の球面状凹部の曲率半径より小さい曲率半径を有する第２の球面状凹部を形成し、第１及び第２の球面状凹部の環状の境界にて玉と接触させるようにしたことを特徴とする。
【０００８】
また、請求項２に記載の発明は、前記第１の球面状凹部を前記平坦部に連なる前後の球面状凹部から形成し、これら前後の球面状凹部の各曲率中心を玉を配置する中心を通る円周方向線上で該中心より若干前記平坦部側にずらせた位置とし、前記第１の球面状凹部の前記前後の球面状凹部が連なる底部に、前記第２の球面状凹部を形成し、第１及び第２の球面状凹部の環状の境界にて玉と接触させるようにしたことを特徴とする。
【０００９】
或いは、請求項３に記載の発明は、前記第１の球面状凹部のピッチ円方向に沿って切断した断面形状を、軸方向に短径を有し円周方向に長径を有する半楕円状に形成したことを特徴とする。
【００１０】
或いはまた、請求項４に記載の発明は、前記第２の球面状凹部の曲率中心を、玉を配置するポケット中心を通る軸方向軸線上で該ポケット中心より第１の球面状凹部の底部側に若干ずらせたことを特徴とする。
【００１１】
【発明の実施の形態】
以下、この発明の具体的実施の形態について図面を参照しながら説明する。
図１はこの発明の玉軸受用波形保持器を構成する片側の環状保持板の斜視図であり、図２はこの環状保持板の周方向の中央断面図であり、図３はこの発明の玉軸受用波形保持器のポケットに玉を配置した状態で円周方向に切断した断面図である。
【００１２】
この波形保持器１を構成する環状保持板２の片側には、円周方向一定間隔に軸方向に膨出する玉保持部３，３，・・・と平坦部４，４，・・とが形成される。該玉保持部３には第１の球面状凹部３ａが形成されると共に、該第１の球面状凹部３ａ内には、更に、小さな第２の球面状凹部３ｂが形成されている。これらの第１の球面状凹部３ａ及び第２の球面状凹部３ｂは玉５を配置するためのポケット６となる。
【００１３】
また、前記玉保持部３に形成される第１の球面状凹部３ａの曲率中心は２つ設けてもよい。即ち、図２に示すように、一方はポケット６の中心Ｏ0 より若干周方向後側（説明の都合上、一方を後側、他方を前側とする）方向にｄ1 ずらせた位置Ｏ1 とし、他方はポケット６の中心Ｏ0 より若干前側方向にｄ1 ずらせた位置Ｏ2 としてある。また、この前後の第１の球面状凹部３ａの曲率半径Ｒa は玉５の曲率半径Ｒ0 と同等若しくは若干大小のいずれでもよい。尚、前記環状保持板２に形成した第１の球面状凹部３ａから平坦部４にかけては滑らかなＲとなるように加工してある。
更に、第１の球面状凹部３ａを前後の球面状凹部から形成しているが、必要により、１つの球面状凹部から形成してもよく、この場合の曲率中心はポケット６の曲率中心Ｏ0 を通る軸方向軸線上を若干ずらされ、曲率半径Ｒa を玉５の曲率半径Ｒ0 より大きくしてある。
【００１４】
次に、前記環状保持板２に形成する第１の球面状凹部３ａの底部に形成される小さな第２の球面状凹部３ｂの曲率中心は、図２に示すように、玉５を配置するポケット中心Ｏ0 を通る軸方向軸線上を第１の球面状凹部３ａの底部側にｄ2 ずらせた位置Ｏ3 にある。そして、その球面状凹部３ｂの内側の曲率半径Ｒb は、玉５の曲率半径より若干小さくしてある。
また、前記第１の球面状凹部３ａ及び第２の球面状凹部３ｂの形状は、片側の環状保持板２について説明したが、該環状保持板２と接合させる他方の環状保持板の第１の球面状凹部やその底部の第２の球面状凹部についても全く同様である。これにより、玉５は第１の球面状凹部３ａと第２の球面状凹部３ｂの連結縁部にて接触させられる。
【００１５】
この発明の玉軸受用波形保持器１は、上記構成とした環状保持板２の一対を対向接合させ、玉保持部３，３・・で玉５を配置するポケット６を形成すると共に、接合した平坦部４，４，・・に穿設した孔８，８，・・にリベット７を入れて圧潰固定して形成する。この場合、環状保持板２に形成する第１の球面状凹部３ａや該第１の球面状凹部３ａの中の底部に形成する第２の球面状凹部３ｂ及び平坦部４はプレス加工によるため製作は容易である。
【００１６】
図３は、上記構成とした波形保持器、即ち、円周方向等間隔に形成した第１の球状凹部３ａの内部に、更に第２の球面状凹部３ｂを形成した環状保持板２の平坦部４を接合（合掌）させて形成した波形保持器１のポケット６に玉５を配置し中央のピッチ円の周方向に沿って切断した状態を示している。
この図から分かるように、波形保持器２のポケット６に配置された玉５は、環状保持板２に形成した玉保持部３の第１の球面状凹部３ａと、該第１の球面状凹部３ａの底部に形成された第２の球面状凹部３ｂとの環状の境界９，９で支持されていることになる。この場合、具体的には該環状の境界９と玉５が回転するときの軸線Ｚとの角度θはかなり小さくなり、即ち、この波形保持器１を使用する玉軸受の軌道輪が回転するとき、玉５が自転する際、図６に示すように、玉５の自転時の周速度の最も大きな位置Ｐ，Ｐの近傍で波形保持器１のポケット６の内周面で接触するのではなく、自転時の周速度が最も小さくなる位置Ｑ，Ｑの近傍で波形保持器１のポケット６の内周面で接触していることになる。従って、玉５は自転時速度の低い位置で保持器１のポケット６内周面と接触しているため焼付は生じにくくなる。
【００１７】
また、図３からもあきらかなように、回転時の進行方向の波形保持器１のポケット６内の前部、即ち、玉５と環状保持板２，２の接合部近傍は、玉５と接触することはなく、一定の空間１０が形成され、該空間１０は『潤滑剤溜まり』となる。更に、環状保持板２に形成される第１の球面状凹部３ａの内部に形成される小さな第２の球面状凹部３ｂ内の空間１１も玉５とは接触しないため、該空間１１も『潤滑剤溜まり』となる。従って、上記したように形成した環状保持板２，２を対向させるように組み合わせて形成される波形保持器１はその潤滑剤の保持状態が極めてよくなり、耐焼付性が大幅に向上する。
【００１８】
尚、この発明の玉軸受用波形保持器１の他の実施の形態として、玉５を保持させるポケット６を形成する玉保持部３の第１の球面状凹部３ａは、前記環状保持板２のピッチ円周方向に沿って切断した場合、その断面形状が軸方向に短径を有し周方向に長径とした半楕円状の球面状凹部としてもよい。そして該第１の球面状凹部３ａの内部（底部）側に、その曲率半径が玉５の半径より若干小さな曲率半径とし、且つその曲率中心が、該玉を配置するポケット中心Ｏ0 より若干軸線方向側にｄ2 だけずらせた位置とした第２の球面状凹部３ｂを形成してもよい。
【００１９】
【発明の効果】
以上、詳述したように、従来保持器のポケット内周面では、玉の自転速度の最も大きな位置で接触していたため焼付が生じやすいという問題があったが、この発明の玉軸受用波形保持器によれば、玉の自転速度の最も低い位置の近傍で接触させることになるため焼付は生じにくくなる。更に、保持器を構成する環状保持板に形成される第１の球面状凹部の内部に更に形成される第２の球面状凹部と、保持器のポケットの前部と玉との間に形成される空間が共に潤滑剤溜まりとなるため潤滑剤の保持状態が極めてよくなり耐焼付性を大幅に向上させ、軸受の長寿命化を図ることができる。
【図面の簡単な説明】
【図１】 この発明の玉軸受用波形保持器を構成する片側の環状保持板の斜視図である。
【図２】 この発明の玉軸受用波形保持器を構成する環状保持板の周方向の中央断面図である。
【図３】 この発明の玉軸受用波形保持器のポケットに玉を配置し中央の円周方向に沿って切断した状態の断面図である。
【図４】 従来の玉軸受用波形保持器の斜視図である。
【図５】 図５（Ａ）は、従来の玉軸受用の波形保持器の中央の円周方向に沿って切断した状態の断面図であり、図５（Ｂ）は図５（Ａ）のＡ−Ａ矢視図であって保持器と玉との接触部分を示す図である。
【図６】 玉軸受用の波形保持器のポケットに配置される玉の自転状態を示す図である。
【図７】 従来の波形保持器の一部斜視図である。
【符号の説明】
１ 波形保持器
２ 環状保持板
３ 玉保持部
３ａ 第１の球面状凹部
３ｂ 第２の球面状凹部
４ 平坦部
５ 玉
６ ポケット
７ リベット
９ 第１の球面状凹部と第２の球面状凹部の環状の境界
１０，１１ 空間（潤滑剤溜まり）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a corrugated cage for ball bearings, and more particularly to a ball bearing corrugated cage used in an environment with severe lubrication conditions, such as a crankshaft of a two-cycle engine, and having a structure in which seizure hardly occurs. The present invention relates to a waveform holder.
[0002]
[Prior art]
The corrugated cage for ball bearings is formed with pockets for arranging balls by opposingly joining two annular holding plates formed with ball holding portions that bulge in the axial direction in a circumferentially equal distribution. Usually, the inner surface of the pocket of the corrugated cage is formed so as to have a radius of curvature that is about several percent larger than the radius of curvature of the ball used to hold the ball.
That is, as shown in the perspective view of FIG. 4, the conventional waveform holder 21 includes two annular holding plates 22, 22 formed with ball holding portions 23, 23,. The ball holding part 23 and the ball holding part 23 are made to face each other so as to form a pocket 26, and flat parts (joining parts) 24, 24 are joined and fixed with rivets 7. The waveform holder 21 in which balls are arranged in the pocket 26 is arranged in an annular space formed between an inner ring and an outer ring (both not shown).
[0003]
As a conventional corrugated cage for ball bearings, a ball bearing retainer (actually, a ball retaining portion forming a pocket for preventing vibration and noise is formed into a rotating ellipse having a minor axis in the radial direction of the cage). No. 40-14964), or a ball bearing retainer assembled so that the two annular holding plates forming the ball holding portion can move relatively in parallel with each other in order to ensure smooth rotation of the ball. No. 53-42681) or a ball having a pocket 36 in which cylindrical regions 34, 34, 34, 34 are formed in a part of a ball holding portion 33, 33 bulged in the axial direction as shown in FIG. A corrugated cage 31 for bearings (Japanese Patent Laid-Open No. 3-172613) has been proposed.
[0004]
FIG. 5A is a cross-sectional view of the above-described conventional ball cage for ball bearing 21 cut along the pitch circle direction of the bearing. In this case, in the ball bearing, when the raceway ring (inner ring or outer ring) relatively rotates, the ball 5 and the cage 21 also rotate (revolve) at the same time, but the ball 5 is corrugated with the front side in the rotation direction (traveling direction). It rotates (revolves and rotates) while making contact with the inner wall surface of the pocket 26 of the cage 21. That is, when the waveform holder 21 revolves, the ball 5 is in contact with the inner wall surfaces 26a and 26b in the traveling direction of the pocket 26 of the waveform holder 21 while rotating around the axis Z. This contact portion has a shape as shown in FIG. 5B when viewed from the direction of arrows AA in FIG.
[0005]
[Problems to be solved by the invention]
As described above, when the ball 5 comes into contact with the inner wall surface of the pocket 26 and the ball 5 rotates about the axis Z as shown in FIG. 6, the angular velocity during rotation is set to ω (constant) and the ball 5 When r is a radius (vertical distance) from an arbitrary surface to the axis Z, the peripheral speed v of the ball surface is v = ω · r, and therefore the ball 5 is located at a position where the turning radius is the largest. It is in contact with the pocket inner surface of the waveform holder 21 in the vicinity. That is, the ball 5 is in contact with the inner wall surface of the pocket in the vicinity of either of the positions P and P having the maximum rotation peripheral speed, so that the problem of seizure is likely to occur.
In the waveform holder 31 as shown in FIG. 7, the ball cannot be guided in the radial direction. That is, such a cage that holds the balls arranged between the inner and outer rings is free to move in the radial direction, and when rotating, the so-called razor movement of the cage becomes intense, causing abnormal vibration and abnormal wear. There is a problem that (seizure) tends to occur and rotation at high speed tends to be unstable.
[0006]
The present invention has been made by paying attention to the above-mentioned problems, and it is difficult to cause seizure between the ball and the cage, and it is possible to hold the lubricant for a long time, and to keep the bearing life longer. The purpose is to provide a vessel.
[0007]
[Means for Solving the Problems]
In other words, in order to solve the problem to be solved by the present invention, the invention according to claim 1 includes two pieces of ball holding portions and flat portions that bulge in the axial direction at predetermined intervals in the circumferential direction. In the corrugated cage for ball bearings in which the annular holding plates are combined so as to oppose each ball holding portion to form a pocket for holding the ball, each ball holding portion formed on each of the annular holding plates is a ball. A second spherical concave portion formed with a first spherical concave portion having a larger radius of curvature and having a radius of curvature smaller than that of the first spherical concave portion at the bottom of the first spherical concave portion. And is made to contact with the ball at the annular boundary between the first and second spherical recesses.
[0008]
According to a second aspect of the present invention, the first spherical concave portion is formed from front and rear spherical concave portions that are continuous with the flat portion, and the center of curvature of each of the front and rear spherical concave portions is the center where the ball is disposed. The second spherical recess is formed at the bottom part where the front and rear spherical concave portions of the first spherical concave portion are continuous with each other at a position slightly shifted from the center to the flat portion side on the circumferential line passing through. The ball is brought into contact with the annular boundary between the first and second spherical recesses.
[0009]
Alternatively, according to a third aspect of the present invention, the cross-sectional shape of the first spherical concave portion cut along the pitch circle direction is a semi-elliptical shape having a minor axis in the axial direction and a major axis in the circumferential direction. It is formed.
[0010]
Alternatively, in the invention according to claim 4, the center of curvature of the second spherical concave portion is on the bottom side of the first spherical concave portion with respect to the axial center line passing through the pocket center where the ball is disposed. It is characterized by being slightly shifted.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an annular holding plate on one side constituting a corrugated cage for a ball bearing of the present invention, FIG. 2 is a central sectional view in the circumferential direction of the annular holding plate, and FIG. 3 is a ball of the present invention. It is sectional drawing cut | disconnected in the circumferential direction in the state which has arrange | positioned the ball | bowl in the pocket of the waveform holder for bearings.
[0012]
On one side of the annular holding plate 2 constituting the corrugated cage 1, there are ball holding portions 3, 3,... Bulging in the axial direction at regular intervals in the circumferential direction and flat portions 4, 4,. It is formed. The ball holding portion 3 is formed with a first spherical concave portion 3a, and a small second spherical concave portion 3b is formed in the first spherical concave portion 3a. The first spherical recess 3a and the second spherical recess 3b serve as a pocket 6 for placing the ball 5.
[0013]
Further, two curvature centers of the first spherical recess 3a formed in the ball holding portion 3 may be provided. That is, as shown in FIG. 2, one is a position O 1 slightly shifted from the center O 0 of the pocket 6 by d 1 in the circumferential rearward direction (for convenience of explanation, one is the rear side and the other is the front side). The other is a position O 2 shifted slightly d 1 forward from the center O 0 of the pocket 6. The curvature radius R a of the first spherical concave portion 3a of the front and rear can be either equal to or slightly magnitude and radius of curvature R 0 of the ball 5. The first spherical concave portion 3a formed on the annular holding plate 2 and the flat portion 4 are processed to have a smooth R.
Further, although the first spherical concave portion 3a is formed from the front and rear spherical concave portions, if necessary, it may be formed from one spherical concave portion. In this case, the center of curvature is the center of curvature O 0 of the pocket 6. staggered slightly axially axis passing through, are the radius of curvature R a larger than the radius of curvature R 0 of the ball 5.
[0014]
Next, the center of curvature of the small second spherical recess 3b formed at the bottom of the first spherical recess 3a formed in the annular holding plate 2 is a pocket in which the ball 5 is disposed as shown in FIG. It is at a position O 3 that is shifted by d 2 on the axial line passing through the center O 0 toward the bottom side of the first spherical recess 3a. The curvature radius R b inside the spherical recess 3 b is slightly smaller than the curvature radius of the ball 5.
The first spherical concave portion 3a and the second spherical concave portion 3b have been described with respect to the annular holding plate 2 on one side, but the first annular holding plate to be joined to the annular holding plate 2 has the first shape. The same applies to the spherical concave portion and the second spherical concave portion at the bottom. As a result, the ball 5 is brought into contact at the connecting edge between the first spherical recess 3a and the second spherical recess 3b.
[0015]
The corrugated cage 1 for ball bearings of the present invention is formed by joining a pair of annular holding plates 2 having the above-described configuration to face each other to form a pocket 6 in which the balls 5 are arranged by the ball holding portions 3, 3. The flat parts 4, 4,... Are formed by inserting rivets 7 into the holes 8, 8,. In this case, the first spherical concave portion 3a formed on the annular holding plate 2 and the second spherical concave portion 3b formed on the bottom of the first spherical concave portion 3a and the flat portion 4 are manufactured by pressing. Is easy.
[0016]
FIG. 3 shows a corrugated cage having the above-described configuration, that is, a flat portion of the annular holding plate 2 in which a second spherical concave portion 3b is further formed inside the first spherical concave portion 3a formed at equal intervals in the circumferential direction. 4 shows a state in which a ball 5 is arranged in a pocket 6 of a corrugated cage 1 formed by joining (joining) 4 and cut along the circumferential direction of a central pitch circle .
As can be seen from this figure, the ball 5 disposed in the pocket 6 of the corrugated cage 2 includes a first spherical concave portion 3a of the ball holding portion 3 formed on the annular holding plate 2 and the first spherical concave portion. It is supported at annular boundaries 9, 9 with the second spherical recess 3b formed at the bottom of 3a. In this case, specifically, much smaller angle θ of the axis Z when the border 9 and Ball 5 of the annular rotates, i.e., when the bearing ring of the ball bearing that uses this waveform retainer 1 rotates When the ball 5 rotates, as shown in FIG. 6, the ball 5 does not come into contact with the inner peripheral surface of the pocket 6 of the waveform holder 1 in the vicinity of the position P, P where the peripheral speed is the highest when the ball 5 rotates. In the vicinity of the positions Q and Q where the peripheral speed at the time of rotation becomes the smallest, the inner peripheral surface of the pocket 6 of the waveform holder 1 is in contact. Accordingly, the balls 5 are in contact with the inner peripheral surface of the pocket 6 of the cage 1 at a position where the rotation speed is low, so that the seizure hardly occurs.
[0017]
As is clear from FIG. 3, the front part in the pocket 6 of the waveform holder 1 in the traveling direction during rotation, that is, the vicinity of the joint between the ball 5 and the annular holding plates 2, 2 is in contact with the ball 5. The space 10 is not formed, and the space 10 becomes a “lubricant reservoir”. Furthermore, since the space 11 in the small second spherical recess 3b formed inside the first spherical recess 3a formed in the annular holding plate 2 does not contact the ball 5, the space 11 is also “lubricated”. It will be a “drug reservoir”. Accordingly, the corrugated cage 1 formed by combining the annular holding plates 2 and 2 formed as described above has a very good holding state of the lubricant, and the seizure resistance is greatly improved.
[0018]
As another embodiment of the ball bearing corrugated cage 1 of the present invention, the first spherical concave portion 3a of the ball holding portion 3 that forms the pocket 6 for holding the ball 5 is provided on the annular holding plate 2. When cut along the circumferential direction of the pitch, the cross-sectional shape may be a semi-elliptical spherical recess having a minor axis in the axial direction and a major axis in the circumferential direction. Then, on the inside (bottom) side of the first spherical recess 3a, the radius of curvature is slightly smaller than the radius of the ball 5, and the center of curvature is slightly axial from the pocket center O 0 where the ball is disposed. may form a second spherical concave portion 3 b which is the position in which the oscillation light d 2 in the direction.
[0019]
【The invention's effect】
As described above in detail, the pocket inner circumferential surface of the conventional cage has a problem that seizure is likely to occur because it is in contact with the ball at the position where the rotational speed of the ball is the largest. According to the container, since the contact is made in the vicinity of the position where the rotation speed of the ball is the lowest, seizure hardly occurs. Furthermore, it is formed between the second spherical concave portion further formed inside the first spherical concave portion formed in the annular holding plate constituting the cage, and the front portion of the pocket of the cage and the ball. Both of these spaces become a reservoir of lubricant, so that the state of holding the lubricant is extremely improved, and seizure resistance is greatly improved, and the life of the bearing can be extended.
[Brief description of the drawings]
FIG. 1 is a perspective view of an annular holding plate on one side constituting a corrugated cage for ball bearings according to the present invention.
FIG. 2 is a central sectional view in the circumferential direction of an annular holding plate constituting the corrugated cage for ball bearings of the present invention.
FIG. 3 is a cross-sectional view of a ball bearing corrugated cage according to the present invention in which a ball is disposed in a pocket and cut along a central circumferential direction.
FIG. 4 is a perspective view of a conventional corrugated cage for ball bearings.
FIG. 5 (A) is a cross-sectional view of the conventional corrugated cage for ball bearings cut along the central circumferential direction, and FIG. 5 (B) is a cross-sectional view of FIG. 5 (A). It is an AA arrow directional view, and is a figure which shows the contact part of a holder | retainer and a ball.
FIG. 6 is a view showing a rotation state of balls arranged in a pocket of a corrugated cage for ball bearings.
FIG. 7 is a partial perspective view of a conventional waveform holder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Corrugated cage 2 Annular holding plate 3 Ball holding part 3a 1st spherical recessed part 3b 2nd spherical recessed part 4 Flat part 5 Ball 6 Pocket 7 Rivet
9 Annular boundary 10, 11 space (lubricant pool) between the first spherical recess and the second spherical recess

Claims (4)

軸方向に膨出する玉保持部と平坦部とを円周方向に所定間隔に形成した二枚の環状保持板が、各玉保持部を対向させるように組み合わされて玉を保持するポケットを形成してなる玉軸受用波形保持器において、
前記両環状保持板に形成したそれぞれの玉保持部を玉より大きな曲率半径を有する第１の球面状凹部にて形成するとともに、該第１の球面状凹部の底部に、第１の球面状凹部の曲率半径より小さい曲率半径を有する第２の球面状凹部を形成し、第１及び第２の球面状凹部の環状の境界にて玉と接触させるようにしたことを特徴とする玉軸受用波形保持器。Two annular holding plates formed with a ball holding portion and a flat portion bulging in the axial direction at predetermined intervals in the circumferential direction are combined so that each ball holding portion faces each other to form a pocket for holding a ball In the corrugated cage for ball bearings,
Each ball holding portion formed on each of the annular holding plates is formed by a first spherical concave portion having a larger radius of curvature than the ball, and a first spherical concave portion is formed at the bottom of the first spherical concave portion. A ball bearing corrugation characterized in that a second spherical recess having a radius of curvature smaller than the radius of curvature is formed and brought into contact with the ball at the annular boundary between the first and second spherical recesses. Cage. 前記第１の球面状凹部を前記平坦部に連なる前後の球面状凹部から形成し、これら前後の球面状凹部の各曲率中心を玉を配置する中心を通る円周方向線上で該中心より若干前記平坦部側にずらせた位置とし、前記第１の球面状凹部の前記前後の球面状凹部が連なる底部に、前記第２の球面状凹部を形成し、第１及び第２の球面状凹部の環状の境界にて玉と接触させるようにしたことを特徴とする請求項１に記載の玉軸受用波形保持器。The first spherical concave portion is formed of front and rear spherical concave portions that are continuous with the flat portion, and the center of curvature of each of the front and rear spherical concave portions is slightly above the center on a circumferential line passing through the center where the ball is disposed. The second spherical concave portion is formed at the bottom portion where the front and rear spherical concave portions of the first spherical concave portion are connected to the flat portion side, and the first and second spherical concave portions are annular. The ball bearing corrugated cage according to claim 1, wherein the ball bearing corrugated cage is brought into contact with the ball at the boundary. 前記第１の球面状凹部のピッチ円方向に沿って切断した断面形状を、軸方向に短径を有し円周方向に長径を有する半楕円状に形成したことを特徴とする請求項１または請求項２に記載の玉軸受用波形保持器。  The cross-sectional shape of the first spherical concave portion cut along the pitch circle direction is formed into a semi-elliptical shape having a minor axis in the axial direction and a major axis in the circumferential direction. The corrugated cage for ball bearings according to claim 2. 前記第２の球面状凹部の曲率中心を、玉を配置するポケット中心を通る軸方向軸線上で該ポケット中心より第１の球面状凹部の底部側に若干ずらせたことを特徴とする請求項１乃至請求項３のいずれかに記載の玉軸受用波形保持器。The center of curvature of the second spherical recess is slightly shifted from the center of the pocket toward the bottom of the first spherical recess on an axial axis passing through the pocket center where the ball is placed. The corrugated cage for ball bearings according to claim 3.
JP16056296A 1996-05-31 1996-05-31 Corrugated cage for ball bearings Expired - Fee Related JP3682611B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP16056296A JP3682611B2 (en) 1996-05-31 1996-05-31 Corrugated cage for ball bearings
DE69730777T DE69730777T2 (en) 1996-05-31 1997-05-28 Pressed cage for a ball bearing
EP97108855A EP0810381B1 (en) 1996-05-31 1997-05-28 Pressed cage for a ball bearing
US08/866,156 US5806990A (en) 1996-05-31 1997-05-30 Pressed cage for a ball bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16056296A JP3682611B2 (en) 1996-05-31 1996-05-31 Corrugated cage for ball bearings

Publications (2)

Publication Number Publication Date
JPH09317775A JPH09317775A (en) 1997-12-09
JP3682611B2 true JP3682611B2 (en) 2005-08-10

Family

ID=15717675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16056296A Expired - Fee Related JP3682611B2 (en) 1996-05-31 1996-05-31 Corrugated cage for ball bearings

Country Status (4)

Country Link
US (1) US5806990A (en)
EP (1) EP0810381B1 (en)
JP (1) JP3682611B2 (en)
DE (1) DE69730777T2 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4006836B2 (en) * 1997-08-18 2007-11-14 日本精工株式会社 Ball bearing
DE10136955B4 (en) * 2001-07-28 2010-11-04 Schaeffler Technologies Gmbh & Co. Kg Angular contact ball cage with lubricant pockets
US6827496B2 (en) * 2001-08-28 2004-12-07 Koyo Seiko Co., Ltd. Four-point contact ball bearing
JP4055938B2 (en) * 2002-04-18 2008-03-05 ミネベア株式会社 Radial ball bearing retainer
JP2007010026A (en) * 2005-06-30 2007-01-18 Ntn Corp Cylindrical roller bearing and its cage
WO2009150935A1 (en) * 2008-06-13 2009-12-17 Ntn株式会社 Retainer, deep groove ball bearing, and bearing with seal
EP2174621B1 (en) 2008-10-07 2013-07-17 Finsbury (Development) Limited Prosthesis
JP5583460B2 (en) * 2009-05-14 2014-09-03 Ｎｔｎ株式会社 Transmission bearings
JP5615649B2 (en) 2010-09-28 2014-10-29 Ntn株式会社 Ball bearing
DE102011077935A1 (en) * 2011-06-22 2012-12-27 Aktiebolaget Skf Rolling bearing cage
JP5876237B2 (en) * 2011-06-27 2016-03-02 Ntn株式会社 Synthetic resin cage and ball bearing for ball bearings
DE102011088640A1 (en) * 2011-12-15 2013-06-20 Schaeffler Technologies AG & Co. KG Ball bearing cage, and hereby provided deep groove ball bearings
JP6084365B2 (en) * 2012-03-26 2017-02-22 Ntn株式会社 Cage and ball bearing
JP5966554B2 (en) * 2012-04-17 2016-08-10 日本精工株式会社 Waveform holder and manufacturing method thereof
ITTO20130464A1 (en) * 2013-06-05 2014-12-06 C M S P S P A CAGE FOR BALL BEARINGS.
US9638249B2 (en) * 2015-05-12 2017-05-02 Schaeffler Technologies AG & Co. KG Bearing cage with resilient inserts between pockets
GB2575473B (en) * 2018-07-11 2021-07-28 Edwards Ltd Bearing cage
DE102019131183A1 (en) * 2019-11-19 2020-12-17 Schaeffler Technologies AG & Co. KG Rolling bearing arrangement

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE239026C (en) * 1909-10-31
US1494012A (en) * 1922-01-21 1924-05-13 U S Ball Bearing Mfg Company Ball retainer
GB1348629A (en) * 1971-06-11 1974-03-20 Secr Defence Rolling element bearing
JPS5342681A (en) * 1976-09-30 1978-04-18 Toshiba Corp High frequency compound transistor
US4215906A (en) * 1979-07-19 1980-08-05 General Dynamics Corporation Zero slip four-point contact thrust bearing
DD239026A1 (en) * 1985-07-04 1986-09-10 Waelzlager Normteile Veb KAEFIG FOR WAFER STORAGE
DE3640633A1 (en) * 1986-11-27 1988-06-09 Kugelfischer G Schaefer & Co KAEFIG FOR BALL BEARINGS
DE3901250A1 (en) * 1989-01-18 1990-07-26 Kugelfischer G Schaefer & Co KAEFIG FOR BALL BEARINGS
DE3939438A1 (en) * 1989-11-29 1991-06-06 Kugelfischer G Schaefer & Co KAEFIG FOR BALL BEARINGS
JPH0414764A (en) * 1990-05-07 1992-01-20 Matsushita Electric Ind Co Ltd Organic electrolyte cell

Also Published As

Publication number Publication date
JPH09317775A (en) 1997-12-09
EP0810381B1 (en) 2004-09-22
US5806990A (en) 1998-09-15
DE69730777D1 (en) 2004-10-28
EP0810381A1 (en) 1997-12-03
DE69730777T2 (en) 2005-09-29

Similar Documents

Publication Publication Date Title
JP3682611B2 (en) Corrugated cage for ball bearings
US6817770B2 (en) Single row deep groove radial ball bearing
JP4188666B2 (en) Resin cage for rolling bearings
JP3039087B2 (en) Spherical roller bearing with cage
EP0613531A1 (en) Cage for roller bearings
JP3744663B2 (en) Radial ball bearing cage and radial ball bearing
JP3114438B2 (en) Rolling bearing
JPH11182537A (en) Rolling bearing unit for wheel
JP3595063B2 (en) Ball bearing
US5123756A (en) Roller bearing and segmented roller retainer therefor
JP3733494B2 (en) Corrugated cage for ball bearings
JP4082032B2 (en) Ball bearing cage and ball bearing
JP2008267400A (en) Ball bearing
JP3743775B2 (en) Corrugated cage for ball bearings
JP2000320558A (en) Synthetic resin made retainer for roller bearing
JP4147500B2 (en) Roller bearing cage
JPH09273557A (en) Corrugated holder for ball bearing
JP3595065B2 (en) Wave cage for ball bearings
JP2000213545A (en) Retainer for roller bearing
JPH0319409B2 (en)
JP2002195272A (en) Flanged cylindrical roller bearing
JP3751771B2 (en) Ball bearing
JP4196390B2 (en) Spherical roller bearing
WO2020145391A1 (en) Roller bearing
JP2024000638A (en) Cage for ball bearing and ball bearing

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20020319

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20040227

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040803

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040930

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20050510

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050511

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090603

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100603

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100603

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110603

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120603

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120603

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130603

Year of fee payment: 8

LAPS Cancellation because of no payment of annual fees